WxDecoder

4CL1 Weather Lyon Heliport

Rancho Santa Margarita, CaliforniaElevation 898 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KSNA · 14 NM W · 46 min old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KSNA
WIND
240@5
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 224° at 3 kt, temperature 16.11C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests this afternoon sunny, high near 79F, low near 59F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
This Afternoon Sunny 79/59 W 4 kt – 0%
Monday Sunny 78/55 NW 9 kt – 0%
Tuesday Sunny 74/55 S 4 kt – 0%
Wednesday Patchy Fog then Mostly Sunny 71/55 S 4 kt – 1%
Thursday Mostly Cloudy 70/56 SE 4 kt – 22%
Friday Slight Chance Rain Showers 68/55 S 4 kt – 27%
Saturday Chance Rain Showers 66/54 S 4 kt – 66%

Source: National Weather Service (office SGX). Forecast issued 2138Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND
Crosswind calculator
No runway layout is available for 4CL1. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 74 ft

H1
Dimensions
74 x 40 ft
Surface
Turf
Edge lights
PERI
RWY H1

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

Field elevation
898 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0105Z 6:05 PM
Sunrise
1404Z 7:04 AM
Loggable night
0130Z (6:30 PM local) → 1338Z (6:38 AM local)
end of evening to start of morning civil twilight
Position lights required
0105Z (6:05 PM local) → 1404Z (7:04 AM local)
sunset to sunrise (91.209)
Night passenger currency
0205Z (7:05 PM local) → 1304Z (6:04 AM local)
1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Lyon Heliport is in Rancho Santa Margarita, California. Field elevation 898 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeHeliport
ManagerMARK FOSTER, MARTIN AVIATION
Manager phone(714) 210-2945
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA4CL1
SectionalLOS ANGELES
Center (ARTCC)LOS ANGELES
Flight service (AFSS)SAN DIEGO
RegionCalifornia
CountryUnited States
Coordinates33.6134, -117.5910
Distance from city2 NM SE
SERVICES & LIGHTING
Control towerNon-towered
Field lightingSee remarks
AIRCRAFT ACTIVITY

4CL1 traffic patterns

2026-06-19 to 2026-06-19, 1 days observed · data 2026-10-23

Insufficient confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1
AVG OPS/DAY
4
Operations trend (1 days)

Busiest day: Fri · Busiest month: Jun

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›P28A (Piston single) · ~1 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly single-engine piston aircraft.

›P28A (Piston single)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

4CL1 has no on-field report. Nearest reporting station: KSNA (14 NM W, VFR).

KSNA John Wayne Orange County International Airport
14 NM W
VFR
KRAL Riverside Municipal Airport
22 NM N
VFR
KCNO Chino Airport
22 NM N
VFR
KRIV March Air Reserve Base
23 NM NE
VFR
KFUL Fullerton Municipal Airport
25 NM NW
VFR
KSLI Los Alamitos Army Air Field
25 NM NW
VFR
AIRPORT REMARKS

Operational remarks

›PROVIDED PVT USE VFR; HELICOPTERS SHALL NOT OVERFLY CONTO DE CAZA DRIVE ON TKF OR LDG; & INSTALL LIGHTING FOR NIGHT OPNS IN ACCORDANCE WITH FAA GUIDANCE.
›FOR PERIMETER LGTS CALL 714-210-2945.
›10 FT TREE 19 FT SE.
›FOR CD CTC LOS ANGELES ARTCC AT 661-575-2079.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗4CL1 on OurAirports
FREQUENTLY ASKED
Does 4CL1 have a METAR?
No on-field METAR is issued for 4CL1. This page uses the nearest reporting station as a reference.
Does 4CL1 have a TAF?
No TAF is issued directly for 4CL1. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 4CL1?
4CL1 sits at 898 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 4CL1?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.